<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '', 'vcenter' ]" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      /* 控制添加用户对话框的显示与隐藏 */
      addDialogVisible: false,
      /* 控制分配权限对话框的显示与隐藏 */
      setRightDialogVisible: false,
      /* 所有权限的数据 */
      rightslist: [],
      /* 树形控件的属性绑定对象 */
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      /* 默认选中的节点Id值数组 */
      defKeys: [],
      /* 当前即将分配权限的id */
      roleId: '',
      /* 添加角色的表单数据 */
      addForm: {
        roleName: '',
        roleDesc: '',
      },
      /* 添加角色的验证规则对象 */
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 8,
            message: '角色名称的长度在3~8个字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 3,
            max: 20,
            message: '角色描述的长度在3~20个字符之间',
            trigger: 'blur',
          },
        ],
      },
      /* 控制修改角色对话框的显示与隐藏 */
      editDialogVisible: false,
      /* 查询到用户角色的信息对象 */
      editForm: {},
      /* 修改表单的验证规则对象 */
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 8,
            message: '角色名称的长度在3~8个字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 3,
            max: 20,
            message: '角色描述的长度在3~20个字符之间',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      // console.log(this.rolelist)
    },

    /* 监听添加用户对话框的close事件 */
    addDialogClosed() {
      /* 在close事件的出力函数中，拿到表单的引用然后调用resetFields()函数就行 */
      this.$refs.addFormRef.resetFields()
    },

    /* 点击按钮，添加新角色 */
    addRole() {
      /* 先拿到整个表单的引用对象 然后调用validate函数 其参数是个布尔类型 */
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        /* 可以发起添加角色的网络请求 */
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功！')
        /* 隐藏添加用户的对话框 */
        this.addDialogVisible = false
        /* 重新获取用户列表 */
        this.getRolesList()
      })
    },

    /* 展示修改角色的对话框 */
    async showEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户角色失败！')
      }
      console.log(res.data)
      /* 把查询到的data赋值给editForm */
      this.editForm = res.data
      // console.log(this.editForm);
      this.editDialogVisible = true
    },

    /* 监听修改角色对话框的关闭事件 */
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },

    /* 修改角色信息并提交 */
    editRoleInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        console.log(valid)
        console.log(this.editForm.roleId)
        if (!valid) return
        /* 发起修改用户角色的数据请求 */
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户角色失败！')
        }
        /* 关闭修改对话框 */
        this.editDialogVisible = false
        /* 刷新数据列表 */
        this.getRolesList()
        /* 提示修改成功 */
        this.$message.success('更新用户角色成功！')
      })
    },

    /* 根据id删除对应的角色信息 */
    async removeRoleById(id) {
      /* 通过$confirm弹框询问是否删除角色数据 */
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      // 进行删除操作
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败!')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    },

    /* 根据id删除对应的权限 */
    async removeRightById(role, rightId) {
      /* 弹框提示用户是否要删除 */
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消了删除')
      }
      //执行删除操作
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      this.$message.success('删除权限成功')
      role.children = res.data
    },

    /* 展示分配权限的对话框 */
    async showSetRightDialog(role) {
      this.roleId = role.id
      /* 获取所有权限的数据 */
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      /* 把获取到的数据保存到rightslist中 */
      this.rightslist = res.data
      console.log(this.rightslist)
      /* 递归获取三级节点的id */
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },

    /* 通过递归的方式,获取角色下所有三级权限的id并保存到defKeys[]数组中 */
    getLeafKeys(node, arr) {
      /* 如果当前node节点不包含children属性则是三级节点 */
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },

    /* 监听分配权限对话框的关闭事件 */
    setRightDialogClosed() {
      this.defKeys = []
    },

    /* 为角色分配权限 */
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      // console.log(keys);
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
